Biomedical Core

  1. An example of an upper respiratory tract infection is
  2. Streptococcus pyogenes is
    the causative organism of "strep throat," a common infection in the winter months. Other bacterial infections of the upper tract invade the ears, eyes, sinuses and the upper bronchioles.
  3. Lower respiratory tract infections are the
    bacteria-caused pneumonias.
  4. Capsulated organisms that cause pneumonias include
    Haemophillus influenzae

    Klebsiella pneumoniae

    Streptococcus pneumoniae
  5. Gastrointestinal bacterial infections, often
    acquired from contaminated food or water.
  6. Contaminated food or water include
    • Salmonella
    • Shigella
    • Staphylococcus aureus
    • E. coli O157:H7
  7. E. coli 0157: H7, common to the intestinal tract of
    cattle, has been linked to contaminated meats and vegetables.
  8. Nervous System infections of the cerebrospinal fluid and meninges can be caused by several bacteria.  Common examples are
    Haemophilus Influenzae- particularly in children.

    Neisseria Meningitidis- in young adults.
  9. Some organisms secrete toxins which either
    cause diseas directly, or trigger an abnormal response in the body which causes illness.
  10. Examples of toxin-induced infections
    Botulism (clostridium botulinum)

    Tetanus (clostridium tetani)

    Toxic Shock Syndrome (staphylococcus aureus)
  11. Two classes that must be intracellular to survive:
    • Chlamydia
    • Rickettsias
  12. Obligate intracellular organisms
    require a eukaryotic cell for replication.
  13. Chlamydia trachomatis causes a variety of human infections including:
    Trachoma (eye infection that may lead to blindness)

    Sexually-transmitted diseases causing pelvic inflammatory disease and urethritis.

    Conjunctivitis in newborns acquired during birthing process.
  14. Chlamydia is the most common sexually transmitted disease in the US causing ______ _______ _________ in women and ________ in males.  Another variant causes _____ ______ in newborns acquired during passage through birth canal.
    Pelvic inflammatory disease (PID); urethritis; epidemic conjunctivitis
  15. Rickettsia
    Obligate intracellular parasite

    Transmitted by a vector (lice, ticks)

    Transmitted to humans through bite of the vector

    Rocky Mountain Spotted Fever is a systemic disease that is common in many states in the US.
  16. Mycoplasmas
    Tiniest free-living organisms.

    Do not have a cell wall.

    Mycoplasma pneumoniae- causes primary atypical pneumonia.
Card Set
Biomedical Core
Objective 12.13